Class VI. SHELLS. 8 5 



the other. Ufual breadth about two inches and an 

 half. Shell fub-pellucid, radiated from the hinge 

 to the margin. 



Tab. xlvi. Jig. 24. 



Inhabits the fame place. 



Lin. Syji. 1 1 14. No. 37. Lift. Conch. 42 1. Cultellus. 



25. Kidney. 



S. with a kidney-maped fhell •, with a fingle tooth 

 in both fides of the hinge. The fhell covered with 

 a rough epidermis. Breadth near two inches •, length 

 feven-eighths of an inch. 



Inhabits the fea near Weymouth. 



Tab. xlvi. Jig. 25. 



This fpecies borders on the my<e> and connects 

 the genera. 



I am not acquainted with the natural hiftory of 

 the two lad. The three firft lurk in the fand 

 near low-water mark, in a perpendicular direction : 

 and when in want of food, elevate one end a little 

 above the furface, and protrude their bodies far 

 out of the fhell. At approach of danger, they 

 dart deep into the fand, fometimes at left two 

 feet. Their place is known by a fmall dimple 

 on the furface. Sometimes they are dug out of 

 the fand with a fhovel ; at other times are taken 

 by a bearded dart fuddenly (truck into them. They 



G 3 were 



